EDP Sciences
Free access
Volume 390, Number 2, August I 2002
Page(s) 667 - 671
Section Diffuse matter in space
DOI http://dx.doi.org/10.1051/0004-6361:20020774

A&A 390, 667-671 (2002)
DOI: 10.1051/0004-6361:20020774

Deconstructing IRAS 07027-7934

R. Surendiranath

Indian Institute of Astrophysics, Koramangala II Block, Bangalore - 560034, India

(Received 13 March 2002 / Accepted 27 May 2002)

The planetary nebula IRAS 07027-7934 has a compact ionized core surrounded by a large cloud of matter believed to be of neutral gas and dust particles. A photoionization model of this ionized core is presented in this paper. The parameters  $T_{\rm eff}$, $R_{\ast}$, and distance of the central star along with the radius of the nebula are derived by photoionization modeling. The nebula is found to have a much lower electron temperature than was estimated earlier but the electron density is very high, in broad agreement with previous result. The abundances derived for the first time point to a C/O ratio of > 5 for the nebula, and the internal extinction caused by the ionized core, E(B-V), is 2.

Key words: planetary nebulae: individual: IRAS 07027-7934 -- planetary nebulae: photoionization modeling -- stars: WC 11

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